Turquoise, tanzanite and zircon are the three birthstones for December , you have an abundance of colour and stones to choose from. The turquoise birthstone was thought to possess many beneficial powers, like guaranteeing health and good fortune. The rare tanzanite is found in just one place on earth &Tiffany & Co named this blue-violet variety of zoisite in honor of Tanzania, where it was first unearthed in 1967. Zircons are believed to protect the wearer and bring wealth, wisdom and good health.